In this interview with American Museum of Natural History paleontologist Neil Landman, you'll learn about the ammonites, incredible, ancient creatures who looked like a cross between squid and snail — and once ruled the seas in massive numbers, until they were finally wiped out by the same catastrophe that destroyed the dinosaurs. Landman shows us amazing ammonite fossils and shows off his rare specimen of a giant squid jaw.

He also takes us to see the CT scanner that he and his colleagues at the museum use to learn more about the structure of fossils without damaging them in any way. If you love fossils and paleontology, this is a must-see interview.